Aggregation Framework Vulnerability in MongoDB Server
CVE-2026-18704

7.1HIGH

Key Information:

Vendor

Mongodb
Status
Mongodb Server
Vendor
CVE Published:
11 August 2026

What is CVE-2026-18704?

An issue within the MongoDB Server's aggregation framework allows authenticated users with only read privileges to execute write operations on collections unauthorized for them. This vulnerability arises from an internal aggregation stage being accessible to external clients without the needed authorization checks on its operations.

Affected Version(s)

MongoDB Server 8.3.0 < 8.3.8

References

https://jira.mongodb.org/browse/SERVER-129936

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.